"He had some mental issues, he was depressed, he was paranoid, and that was further complicated by some substance abuse issues," Monique Coats said.

She said her brother never turned to anyone for help.

"When you have family that is living a very tormented existence, they may not be willing to accept your help, but they're always willing to accept your love," she said.

She was there when police surrounded Clarence Coats Jr., 41, on top of a roof and pleaded with officers to not shoot. Police say Coats fired at officers, so they returned fire. About 20 officers responded to reports of Clarence Coats Jr. walking around and firing a gun.